IB ESS SL 2.2.11 Food Chains and Trophic Levels Questions

Interpret trophic levels and energy movement through food chains.

Exam points

construct a food chain from a food web using named organisms and arrows from producers toward successive consumers
identify trophic levels by naming producers and primary, secondary or tertiary consumers from a food chain or food web
explain how source energy becomes producer chemical energy, passes to consumers by feeding and reaches decomposers through waste or death

[Maximum number: 1]

Figure A simplified food web in a kelp forest ecosystem

Figure Kelp forest ecosystems with and without the presence of sea otters

The arrows indicate the flow of carbon between the atmosphere and the carbon stored in kelp.

State the trophic level of sea urchins in the kelp forest ecosystem shown in Figure.

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